help this is due soon!!

Question

bills school is selling tickets to a play. On the first day of ticket sales the school sold 2 senior tickets and 14 child tickets for a total of $100. The school took in $90 on the second day by selling 6 senior citizen tickets and 7 child tickets what is the price of each senior ticket and child ticket?

Answer 1

2s +14c = 100

s +7c = 50

6s +7c = 90

subtract

5s = 40

s = $8 for senior tickets

c = (50-8)/7 = 42/7 = $6 child tickets